CN105946158B - High polymer material temperature isostatic pressing method - Google Patents
High polymer material temperature isostatic pressing method Download PDFInfo
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- CN105946158B CN105946158B CN201610338509.6A CN201610338509A CN105946158B CN 105946158 B CN105946158 B CN 105946158B CN 201610338509 A CN201610338509 A CN 201610338509A CN 105946158 B CN105946158 B CN 105946158B
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- temperature
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- medicine
- isostatic pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of high polymer material temperature isostatic pressing method, raw material are fitted into mould, then mould vacuumized；The combination of mould medicine is preheated by baking oven, it is consistent with oven temperature to be preheating to whole mould medicine combination；After the completion of preheating, mould medicine is combined and taken out, be put into warm isostatic pressing machine rapid pressure to be suppressed；After the completion of compacting, slow release；Then the combination of mould medicine is put into baking oven again and carries out second of preheating, adjusted oven temperature, oven temperature is higher than raw material fusing point；Preheating vacuumizes after terminating to mould medicine combination benefit, then adjusts oil temperature and preheating temperature in press and approaches and is suppressed again；After second of compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.The present invention solves the deformation of products run into during isostatic pressing high polymer material, discoloration problem, reduces mechanical processing difficulty, reduces the dosage of additive, significantly improves shaped article quality.
Description
Technical field
The present invention relates to polymer material molding technical field, and in particular to a kind of high polymer material temperature isostatic pressing side
Method.
Background technology
The production and processing method of high polymer material mainly has compression molding, extrusion molding, is injection moulded, is blow molded at present
Type, but also there is shaping efficiency during the product of shaping complicated shape and large-scale product for these domestic methods
Low, the problems such as Forming Quality stability is poor, waste of material is serious, the porosity is high, thus more than half product dependent on foreign countries
Import.Equal pressing forming technology compared to other moulding process have shaped article isotropic, quality are high, mechanical property is good,
A advantages that near-net-shape can be achieved, and due to its high voltage units shaping characteristic, forming temperature can be reduced and reduce additive
Dosage, a near-net-shape goes out large-scale, special-shaped product.The isostatic pressing of high polymer material is more common in experimental study, in reality
Also less in the application on border, being primarily due to the generation of pressure needs special device.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of high polymer material temperature isostatic pressing method, for solving
The product certainly occurred during polymer material molding changes colour, the porosity is high, ropy technical problem.
In view of the above mentioned problem of prior art, according to one side disclosed by the invention, the present invention uses following technology
Scheme：
A kind of high polymer material temperature isostatic pressing method, it comprises the following steps：
I) raw material are fitted into mould, then the combination of mould medicine is vacuumized；
II) combination of mould medicine is put into baking oven, it is preheated by baking oven, oven temperature is less than raw material fusing point 28
~32 DEG C, when the raw material temperature monitored is consistent with oven temperature, continues one hour of constant temperature and mould medicine is combined into taking-up again；
III) after the combination of mould medicine takes out, be put into warm isostatic pressing machine rapid pressure to be suppressed, during compacting temperature with it is described
Oven temperature approaches, pressing one-time, and pressing pressure is 40~60MPa, and the dwell time is 0.4~0.7 hour；
IV) compacting after the completion of, slow release；
V) after release, the combination of mould medicine is taken out, then the combination of mould medicine is put into baking oven again and carries out second and preheats, adjustment
Oven temperature, oven temperature is set to be higher than 8~12 DEG C of raw material fusing point；
VI) preheating vacuumizes to mould medicine combination benefit after terminating, is put into warm isostatic pressing machine rapid pressure to be suppressed, adjusts
Oil temperature approaches with preheating temperature in seamless machine, pressing one-time, and pressing pressure is 60~80MPa, and the dwell time is 0.9~1.2 small
When；
VII) after second compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.
In order to which the present invention is better achieved, further technical scheme is：
According to one embodiment of the invention, the II) oven temperature is less than 30 DEG C of raw material fusing point in step.
According to another embodiment of the invention, the III) pressing pressure is 50MPa in step, the dwell time 0.5
Hour.
The present invention can also be：
According to another embodiment of the invention, oven temperature is higher than 10 DEG C of raw material fusing point in the v) step.
According to another embodiment of the invention, the VI) pressing pressure is 70MPa in step, the dwell time is 1 small
When.
Compared with prior art, one of beneficial effects of the present invention are：
A kind of high polymer material temperature isostatic pressing method of the present invention, solves isostatic pressing high polymer material process
In the discoloration such as the product that runs into, the porosity be high, problem of poor quality；Using near-net-shape of high pressure, it is difficult to reduce machining
Degree, reduce the dosage of additive, and shaped article neat appearance, the more industrial shaping universal method of mechanical property, which has, significantly to be carried
Rise；The ultra-high molecular weight polyethylene powder-product yield strength suppressed using this method reaches 34.8MPa, and notch impact toughness reaches
To 152.30kJ/m2；DSC test results show that warm isostatic pressing product fusing point is 143.1 DEG C, and crystallinity reaches 69.15%；
This four item data has been respectively increased 40.3%, 313.5%, 7.4%, 21.8% compared with domestic product.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of high polymer material temperature isostatic pressing method, it comprises the following steps：
I) raw material are fitted into mould, then the combination of mould medicine is vacuumized；
II) combination of mould medicine is put into baking oven, it is preheated by baking oven, oven temperature is less than raw material fusing point 28
~32 DEG C, after monitoring that raw material temperature reaches the raw material temperature finally needed, continue one hour of constant temperature again by mould medicine
Combination is taken out；
III) after the combination of mould medicine takes out, be put into warm isostatic pressing machine rapid pressure to be suppressed, during compacting temperature with it is described
Oven temperature approaches, pressing one-time, and pressing pressure is 40~60MPa, and the dwell time is 0.4~0.7 hour；
IV) compacting after the completion of, slow release；
V) after release, the combination of mould medicine is taken out, then the combination of mould medicine is put into baking oven again and carries out second and preheats, adjustment
Oven temperature, oven temperature is set to be higher than 8~12 DEG C of raw material fusing point；
VI) preheating vacuumizes to mould medicine combination benefit after terminating, is put into warm isostatic pressing machine rapid pressure to be suppressed, adjusts
Oil temperature approaches with preheating temperature in seamless machine, pressing one-time, and pressing pressure is 60~80MPa, and the dwell time is 0.9~1.2 small
When；
VII) after second compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.
Mould is by external pressure contraction distortion in pressing process, and pressure is transmitted to raw material by mould, the shape of product by
Mold shape determines.
Embodiment 2
A kind of high polymer material temperature isostatic pressing method, it comprises the following steps：
I) raw material are fitted into mould, then the combination of mould medicine is vacuumized；
II) combination of mould medicine is put into baking oven, it is preheated by baking oven, oven temperature is less than raw material fusing point 30
DEG C, after monitoring that raw material temperature reaches default raw material temperature, continue one hour of constant temperature and mould medicine is combined into taking-up again；
III) after the combination of mould medicine takes out, be put into warm isostatic pressing machine rapid pressure to be suppressed, during compacting temperature with it is described
Oven temperature approaches, pressing one-time, pressing pressure 50MPa, and the dwell time is 0.5 hour；
IV) compacting after the completion of, slow release；
V) after release, the combination of mould medicine is taken out, then the combination of mould medicine is put into baking oven again and carries out second and preheats, adjustment
Oven temperature, oven temperature is set to be higher than 10 DEG C of raw material fusing point；
VI) preheating vacuumizes to mould medicine combination benefit after terminating, is put into warm isostatic pressing machine rapid pressure to be suppressed, adjusts
Oil temperature is identical or basically identical with preheating temperature in seamless machine, pressing one-time, pressing pressure 70MPa, and the dwell time is 1 small
When；
VII) after second compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.
Mould is by external pressure contraction distortion in pressing process, and pressure is transmitted to raw material by mould, the shape of product by
Mold shape determines.
Embodiment 3
Preparatory stage：Shaped article profile is determined, to make the mould for being molded；The fusing point of molding material.
Formative stage：Raw material are fitted into mould, then the combination of mould medicine vacuumized, playing prevents raw material from existing
Because of the effect aoxidized with air contact during subsequent heat.Then adjustment oven temperature is less than 29 DEG C of left sides of raw material fusing point
The right side, solve the problems, such as in warm due to raw material are in uneven pressured state and easy flow deformation.It is preheating to former material
Expect that monitoring temperature is consistent with oven temperature and continue constant temperature 1 hour or so afterwards, then mould medicine is combined and taken out, be put into warm isostatic pressing machine
Boosting.Temperature approaches with oven temperature during compacting, and the rate of rise is quick, pressing one-time, and pressing pressure is 50MPa or so, is protected
It is 0.5 hour or so to press the time, slow release during release.
The combination of mould medicine is taken out after compacting, is then put it into baking oven, adjustment oven temperature is higher than raw material fusing point
10 DEG C or so, be preheating to raw material monitoring temperature it is consistent with oven temperature after continue constant temperature, constant temperature time according to small product size and
Depending on shape.Preheating vacuumizes after terminating to mould medicine combination benefit, then adjusts oil temperature in press and is approached with preheating temperature, compacting one
Secondary, pressure is 70MPa or so, and the dwell time is 1 hour or so.
After second of compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, identical similar portion cross-reference between each embodiment.
" one embodiment " for being spoken of in this manual, " another embodiment ", " embodiment ", etc., refer to tying
Specific features, structure or the feature for closing embodiment description are included at least one embodiment of the application generality description
In.It is not necessarily to refer to same embodiment that statement of the same race, which occur, in multiple places in the description.Appoint furthermore, it is understood that combining
When one embodiment describes a specific features, structure or feature, what is advocated is this to realize with reference to other embodiment
Feature, structure or feature are also fallen within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modifications and embodiment, and these modifications and embodiment will fall in this Shen
Please be within disclosed spirit and spirit.More specifically, can be to master in the range of disclosure and claim
The building block and/or layout for inscribing composite configuration carry out a variety of variations and modifications.Except what is carried out to building block and/or layout
Outside variations and modifications, to those skilled in the art, other purposes also will be apparent.
Claims (5)
1. a kind of high polymer material temperature isostatic pressing method, it is characterised in that it comprises the following steps：
I) raw material are fitted into mould, then the combination of mould medicine is vacuumized；
II) combination of mould medicine is put into baking oven, it is preheated by baking oven, oven temperature is less than raw material fusing point 28~32
DEG C, when the raw material temperature monitored sets temperature consistent with baking oven, continue one hour of constant temperature and mould medicine is combined into taking-up again；
III) after the combination of mould medicine takes out, rapid pressure is put into warm isostatic pressing machine to be suppressed, temperature and the baking oven during compacting
Temperature approaches, pressing one-time, and pressing pressure is 40~60MPa, and the dwell time is 0.4~0.7 hour；
IV) compacting after the completion of, slow release；
V) after release, the combination of mould medicine is taken out, then the combination of mould medicine is put into baking oven again and carries out second and preheats, adjusts baking oven
Temperature, oven temperature is set to be higher than 8~12 DEG C of raw material fusing point；
VI) preheating vacuumizes after terminating to mould medicine combination benefit, rapid pressure is put into warm isostatic pressing machine to be suppressed, adjustment pressure
Oil temperature approaches with preheating temperature in machine, pressing one-time, and pressing pressure is 60~80MPa, and the dwell time is 0.9~1.2 hour；
VII) after second compacting terminates, the combination of mould medicine is taken out, it is carried out to move back mould.
2. high polymer material temperature isostatic pressing method according to claim 1, it is characterised in that the II) dry in step
Box temperature degree is less than 30 DEG C of raw material fusing point.
3. high polymer material temperature isostatic pressing method according to claim 1, it is characterised in that the III) press in step
Pressing pressure is 50MPa, and the dwell time is 0.5 hour.
4. high polymer material temperature isostatic pressing method according to claim 1, it is characterised in that dried in the v) step
Box temperature degree is higher than 10 DEG C of raw material fusing point.
5. high polymer material temperature isostatic pressing method according to claim 1, it is characterised in that the VI) press in step
Pressing pressure is 70MPa, and the dwell time is 1 hour.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610338509.6A CN105946158B (en) | 2016-05-19 | 2016-05-19 | High polymer material temperature isostatic pressing method |
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|---|---|---|---|
| CN201610338509.6A CN105946158B (en) | 2016-05-19 | 2016-05-19 | High polymer material temperature isostatic pressing method |
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| CN105946158A CN105946158A (en) | 2016-09-21 |
| CN105946158B true CN105946158B (en) | 2018-02-06 |
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| CN108638410B (en) * | 2018-04-28 | 2020-05-01 | 中国地质大学（北京） | Production method of reconstructed amber |
Citations (6)
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|---|---|---|---|---|
| US4368217A (en) * | 1980-06-06 | 1983-01-11 | Produits Chimiques Ugine Kuhlmann | Process for providing a polytetrafluoroethylene coating on the walls of a metal body |
| US5429782A (en) * | 1992-12-15 | 1995-07-04 | Nitto Denko Corporation | Process for producing polytetrafluoroethylene molded article |
| CN1654192A (en) * | 2005-03-10 | 2005-08-17 | 杜建国 | Contour machining processes of polyethylene with super-high molecular weight |
| CN102248626A (en) * | 2010-05-17 | 2011-11-23 | 哈尔滨鑫达高分子材料有限责任公司 | Molding method suitable for PEEK (poly(ether-ether-ketone)) |
| CN102476453A (en) * | 2010-11-24 | 2012-05-30 | 浙江中能防腐设备有限公司 | Cold isostatic pressing and hot isostatic pressing sintering method for polytetrafluoroethylene powder or modified polytetrafluoroethylene powder |
| CN103921383A (en) * | 2014-04-25 | 2014-07-16 | 中国工程物理研究院化工材料研究所 | Method and mold for isostatic pressing of polyphenylene sulfide plates |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62214101A (en) * | 1986-03-14 | 1987-09-19 | Hitachi Metals Ltd | Method for sealing metal or alloy powder to vessel for hot hydrostatic press molding |
| JPS63281809A (en) * | 1987-05-14 | 1988-11-18 | Kobe Steel Ltd | Method for press molding of heat resistant resin powder |
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2016
- 2016-05-19 CN CN201610338509.6A patent/CN105946158B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368217A (en) * | 1980-06-06 | 1983-01-11 | Produits Chimiques Ugine Kuhlmann | Process for providing a polytetrafluoroethylene coating on the walls of a metal body |
| US5429782A (en) * | 1992-12-15 | 1995-07-04 | Nitto Denko Corporation | Process for producing polytetrafluoroethylene molded article |
| CN1654192A (en) * | 2005-03-10 | 2005-08-17 | 杜建国 | Contour machining processes of polyethylene with super-high molecular weight |
| CN102248626A (en) * | 2010-05-17 | 2011-11-23 | 哈尔滨鑫达高分子材料有限责任公司 | Molding method suitable for PEEK (poly(ether-ether-ketone)) |
| CN102476453A (en) * | 2010-11-24 | 2012-05-30 | 浙江中能防腐设备有限公司 | Cold isostatic pressing and hot isostatic pressing sintering method for polytetrafluoroethylene powder or modified polytetrafluoroethylene powder |
| CN103921383A (en) * | 2014-04-25 | 2014-07-16 | 中国工程物理研究院化工材料研究所 | Method and mold for isostatic pressing of polyphenylene sulfide plates |
Non-Patent Citations (1)
| Title |
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| 聚合物的高压成型加工;何云伟等;《塑料工业》;20071130;第35卷(第12期);第65页至66页 * |
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